See The Graham; an Heroic Ballad: in Four Cantos. By Thomas Blacklock, D.D. (London: Printed for T. Davies, 1774). <Link to ESTC>

See also Old Ballads, Historical and Narrative, With Some of Modern Date; Now First Collected, and Reprinted from Rare Copies and Mss. With Notes. By Thomas Evans. ([London]: Printed for T. Evans, in the Strand, 1784), vol. 3 of 4. <Link to ECCO>